Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 26

Installation
Electrical Connections
Rated voltage
Rated current Max.
Note: Maximum output 6FLA shared between all
120V outputs.
Pumps 120V
Available pump connections
sÖA1 Heating circuit 1 pump
sÖM2 Heating circuit 2 pump
sÖM3 Heating circuit 3 pump
DHW pump
sA
DHW recirculation pump
sK
Boiler pump/system pump
sL
26
(continued)
120V~
2A~
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Connecting Pumps
Available connections
Connections on extension for heating circuit with mixing
valve HC2/M2, HC3/M3
Plug Terminal
5 L, N, G
sÖ M2
6 L, N, G
sÖ M3
Connections on the PCB 120V~
9 L, N, G
sÖA1
8 L, N, G
sA
7 L, N, G
sK
10 L, N, G
sL
Component
Heating circuit pump
Heating circuit pump
Heating circuit pump
for heating circuit A1
or
Primary pump, tank
loading system
DHW pump
DHW recirculation
pump
boiler pump, system
pump